Final answer:
The pileated woodpecker benefits ducks and bats by creating cavities in trees for nesting and roosting. The cavities provide shelter and protection for these animals.
Step-by-step explanation:
The pileated woodpecker benefits other animals like ducks and bats by creating cavities in trees, which serve as nesting sites for ducks and roosting sites for bats. These cavities provide shelter and protection for the other animals. Additionally, the woodpecker's behavior of drilling into trees allows sap to flow, attracting insects that become food for ducks and bats.